Bridging condenser for high frequency arrangements



E. GOSSEL June 6, 1939.

BRIDGING CONDENSER FOR HIGH FREQUENCY ARRANGEMEN Filed Feb. 5, 1937 Patented June 6, 1939 UNITED STATES PATENT OFFICE BRIDGING CONDENSER FOR HIGH FRE- QUENCY ARRANGEMENTS Application February 5, 1937, Serial No. 124,265 In Germany February 5, 1936 2 Claims.

The invention relates to condensers of the kind used in high frequency arrangements in order to bridge over leads of very high frequencies and thereby to short-circuit such leads by capacity 5 means or capacitively to earth them. More particularly the invention is concerned with devices of this type in which the leads are arranged to form one coating of the condenser themselves, and it has for its object to obviate oscillations of such portions of the leads as are not forming a coating of the condenser, being left uncovered by the other coating thereof that may be a metal plate in a well known manner.

With this object in view the invention consists 6 in certain features of novelty which will appear from the following description and be particularly pointed out in the appended claims, reference being bad to the accompanying drawing in which 50 Fig. 1 is a partially diagrammatic elevation showing one embodiment of the invention. Fig. 2, drawn to a larger scale than Fig. 1, represents a section on line 22 thereof.

Only so much of the novel device, which may 5 be either a generator or a receiver, is disclosed as is necessary for understanding the invention.

An insulating plate T, that may be made of a ceramic material, carries an electronic tube E, an insulating plate J and a metal plate M. The

30 plates J, M are secured to plate T by screws S.

Leads H, A of the tube E are clamped fast between plate T and plates J, M. These leads are preferably metal tapes. The arrangement is such that there is a condenser having a coating H, A, a

a5 dielectric J, and a coating M.

The leads H are to feed the heating filament which in the example shown here constitutes the cathode of tube E. Lead A is to supply the anode voltage.

40 Plate M, covering these three leads which serve to supply the operating voltages, acts to shortcircuit the high frequencies capacitively.

In accordance with the invention, that portion of the lead A which is not covered by plate M is constituted by an ohmic resistance R. This resistance is joined to the oscillatory circuit of the tube E at a point near to the condenser C of this circuit and acts to attenuate or damp the said uncovered portion of the lead A. As a result, this portion of lead A will be prevented W from oscillating, and this result allows of spacing the plate M from the tube E and the oscillatory circuit by a distance suflicient to prevent this plate from unduly increasing the space capacity at the oscillation circuit.

Resistance R may be between 10 and 10 ohms but will have to be suited to the relationships of operation and oscillation.

Instead of an ohmic resistance such as R, any other suitable means of attenuation may be 20 provided.

If the leads H, A are to be earthed capacitively, then it is only necessary to connect plate M to earth.

While only lead A is shown here as provided with an attenuation means yet it is to be understood that any other lead of this kind may be fitted therewith.

What is claimed is:

1. In a high frequency device, an oscillatory circuit, an electronic discharge device associated with said circuit, leads for the operating voltages of said circuit and device, a conducting plate spaced from said circuit and cooperating with a section of each of said leads to form a condenser, and attenuating means in one lead between said plate and said circuit.

2. A device according to claim 1, wherein the attenuating means is an ohmic resistance.

ERICK GOSSEL. 4 

